io.github.cyanheads/openfda-mcp-server
openfda-mcp-server
Query FDA data on drugs, food, devices, and recalls via openFDA. STDIO or Streamable HTTP.
alive probed 2026-10-13 · HTTP 200
14tools
19ktokens in Claude Opus 5.5
19ktokens in Claude Code
9.3 %of a 200k context window
11ko200k_base estimate
313 msto initialize
105 msto list tools
- Endpoint
- https://openfda.caseyjhand.com/mcp (streamable-http)
- Host
- openfda.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- openfda-mcp-server 0.8.1
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 409 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-13. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/openfda-mcp-server
- Registry
- active, updated 2026-10-13 · registry entry
- Reachable
- 7 of the last 7 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| openfda_search_animal_events | 1 181 | 10 % |
| openfda_search_adverse_events | 1 165 | 10 % |
| openfda_search_drug_approvals | 1 146 | 10 % |
| openfda_search_recalls | 1 136 | 10 % |
| openfda_search_drug_shortages | 1 117 | 10 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-13 11:15 | alive | 571 ms | 14 | 19k | 11k |
| 2026-10-05 14:39 | alive | 313 ms | 14 | 14k | 8.5k |
| 2026-10-05 00:33 | alive | 205 ms | 14 | 8.5k | |
| 2026-10-04 10:04 | alive | 252 ms | 14 | 8.5k | |
| 2026-10-04 07:57 | alive | 362 ms | 14 | 8.5k | |
| 2026-10-03 20:37 | alive | 846 ms | 14 | 8.5k | |
| 2026-10-03 17:53 | alive | 586 ms | 14 | 8.5k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/openfda-mcp-server)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.